/* Boost interval/detail/sparc_rounding_control.hpp file | |
* | |
* Copyright 2000 Jens Maurer | |
* Copyright 2002 Hervé Brönnimann, Guillaume Melquiond, Sylvain Pion | |
* | |
* Distributed under the Boost Software License, Version 1.0. | |
* (See accompanying file LICENSE_1_0.txt or | |
* copy at http://www.boost.org/LICENSE_1_0.txt) | |
* | |
* The basic code in this file was kindly provided by Jeremy Siek. | |
*/ | |
#ifndef BOOST_NUMERIC_INTERVAL_DETAIL_SPARC_ROUNDING_CONTROL_HPP | |
#define BOOST_NUMERIC_INTERVAL_DETAIL_SPARC_ROUNDING_CONTROL_HPP | |
#if !defined(sparc) && !defined(__sparc__) | |
# error This header is only intended for SPARC CPUs. | |
#endif | |
#ifdef __SUNPRO_CC | |
# include <ieeefp.h> | |
#endif | |
namespace boost { | |
namespace numeric { | |
namespace interval_lib { | |
namespace detail { | |
struct sparc_rounding_control | |
{ | |
typedef unsigned int rounding_mode; | |
static void set_rounding_mode(const rounding_mode& mode) | |
{ | |
# if defined(__GNUC__) | |
__asm__ __volatile__("ld %0, %%fsr" : : "m"(mode)); | |
# elif defined (__SUNPRO_CC) | |
fpsetround(fp_rnd(mode)); | |
# elif defined(__KCC) | |
asm("sethi %hi(mode), %o1"); | |
asm("ld [%o1+%lo(mode)], %fsr"); | |
# else | |
# error Unsupported compiler for Sparc rounding control. | |
# endif | |
} | |
static void get_rounding_mode(rounding_mode& mode) | |
{ | |
# if defined(__GNUC__) | |
__asm__ __volatile__("st %%fsr, %0" : "=m"(mode)); | |
# elif defined (__SUNPRO_CC) | |
mode = fpgetround(); | |
# elif defined(__KCC) | |
# error KCC on Sun SPARC get_round_mode: please fix me | |
asm("st %fsr, [mode]"); | |
# else | |
# error Unsupported compiler for Sparc rounding control. | |
# endif | |
} | |
#if defined(__SUNPRO_CC) | |
static void downward() { set_rounding_mode(FP_RM); } | |
static void upward() { set_rounding_mode(FP_RP); } | |
static void to_nearest() { set_rounding_mode(FP_RN); } | |
static void toward_zero() { set_rounding_mode(FP_RZ); } | |
#else | |
static void downward() { set_rounding_mode(0xc0000000); } | |
static void upward() { set_rounding_mode(0x80000000); } | |
static void to_nearest() { set_rounding_mode(0x00000000); } | |
static void toward_zero() { set_rounding_mode(0x40000000); } | |
#endif | |
}; | |
} // namespace detail | |
extern "C" { | |
float rintf(float); | |
double rint(double); | |
} | |
template<> | |
struct rounding_control<float>: | |
detail::sparc_rounding_control | |
{ | |
static const float& force_rounding(const float& x) { return x; } | |
static float to_int(const float& x) { return rintf(x); } | |
}; | |
template<> | |
struct rounding_control<double>: | |
detail::sparc_rounding_control | |
{ | |
static const double& force_rounding(const double& x) { return x; } | |
static double to_int(const double& x) { return rint(x); } | |
}; | |
template<> | |
struct rounding_control<long double>: | |
detail::sparc_rounding_control | |
{ | |
static const long double& force_rounding(const long double& x) { return x; } | |
static long double to_int(const long double& x) { return rint(x); } | |
}; | |
} // namespace interval_lib | |
} // namespace numeric | |
} // namespace boost | |
#undef BOOST_NUMERIC_INTERVAL_NO_HARDWARE | |
#endif /* BOOST_NUMERIC_INTERVAL_DETAIL_SPARC_ROUNDING_CONTROL_HPP */ |